A dramatically plunging neckline drew attention to Rihanna on the red carpet at the 2012 Grammy Awards. Would it pass muster for the network this year? / Dan MacMedan/USA TODAY

By Elysa Gardner,

USA TODAY

Anyone fearing a wardrobe malfunction at Sunday's 55th Grammy Awards can rest assured that the folks at CBS are doing all they can to avoid such a calamity. Deadline Hollywood has leaked a memo from the network's standards and practices department, warning talent that gratuitous displays of flesh are to be avoided. USA TODAY has confirmed the authenticity of the memo, similar to those sent in previous years.

The advisory, sent to the production staff that deals with talent, advises them to "be sure that buttocks and female breasts are adequately covered." Specifically, "thong-type costumes" and "bare sides or under curvature of the breasts" are deemed "problematic." Visible buttock curves or "buttock crack" are also a no-no, as is "sheer see-through clothing that could possibly expose female breast nipples."

Also prohibited: obscenity printed on wardrobes. And, somewhat vaguely, the network requested that lapel pins or accessories that promote a cause "be avoided."

We'll see if the advisory affects the fashion parade — or the controversies that invariably ensue.